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The Season 4 finale of “Lost Girl” airs Monday (April 7) on Syfy, and you can get a sneak peek at the episode in the above video.

In the finale, titled “Dark Horse,” Massimo (Tim Rozon) strives to make his mother proud by beheading Bo (Anna Silk), whose heart must be sacrificed to close the portal to the underworld. In the clip, Bo asks Dyson (Kris Holden-Ried) to contain the dead warriors that are searching for her.

“Hold back the armies of Hell? I thought you would never ask, my queen,” says Dyson, with a wry smile.